JP6210971B2 - Water stop structure and wire harness - Google Patents

Description

  The present invention relates to a water stop structure at a portion where a sheath end portion in a conductive path with a sheath occurs, and a wire harness formed by employing this water stop structure as a water stop structure portion.

  For example, taking a high-voltage wire harness as an example, Patent Document 1 below discloses a wire harness that electrically connects high-voltage devices mounted on a hybrid vehicle or an electric vehicle. The wire harness of Patent Document 1 includes a conductive path with a sheath, a resin-made exterior member that accommodates and protects the conductive path with a sheath, and a shield connector provided at the end of the conductive path with a sheath. Is done. The conductive path with a sheath includes two insulated wire cores, a braid (shield member) that collectively covers the two insulated wire cores, and a sheath provided by extrusion molding on the outside of the braid. The

  The wire harness performs terminal processing on the conductive path with the sheath led out from the end portion of the exterior member, and the shield connector is provided thereon. More specifically, in the conductive path with the sheath led out from the end of the exterior member, the sheath is first removed by a predetermined length. When the sheath is removed at a predetermined length, the removal creates a sheath end, and the braid is exposed from the sheath end. Next, the braid is raised to expose the two insulated wires, and terminals are provided at each end of the two insulated wires, and the terminals are accommodated in an insulating housing of the shield connector. Finally, the raised braid is returned to its original state, and the end of the braid is connected and fixed to the conductive shield shell of the shield connector. Thus, the shield connector is provided at the end of the sheathed conductive path.

JP 2014-220880 A

  In the above prior art, since the conductive path with the sheath is led out from the end portion of the exterior member and the sheath is removed by the end processing, the portion after the sheath removal is weak against moisture ingress from the outside. It becomes a part. This is because the exposed braid is made of braided metal wires, allowing moisture to pass through, and there is a relatively large gap between the two insulated wire cores. Moisture intrusion occurs when the water flies, for example, when the water level rises and the water exceeds the sheath end.

  As a countermeasure, it is possible to cover a long and large rubber boot from the end of the exterior member to the shield connector. However, when the rubber boot is disposed as described above, there is a concern about an increase in size of the disposed portion. The increase in size leads to a reduction in the degree of freedom of routing to the vehicle.

  The present invention has been made in view of the circumstances described above, and it is an object of the present invention to provide a water stop structure and a wire harness that can stop a sheath end portion generated by removing a sheath at a predetermined length. And

The present invention according to claim 1, which has been made to solve the above problems, includes one or a plurality of insulating cores, a shield member that collectively covers the one or a plurality of insulating cores, and the shield member In the water stop structure of the portion of the conductive path with a sheath provided on the outside of the sheath, where the sheath is removed at a predetermined length to generate a sheath end, a tubular exterior member , a first tape winding portion, a second tape winding portion, and a third tape winding portion, the cylindrical outer member, said cylindrical and said opening and a flexible end portions is formed in the open and no slit tubular And a corrugated tube or pipe in which a space generated between the sheathed conductive path is also maintained, and the first tape winding portion is sandwiched between the sheath end portion and the sheath and the shield member. By straddling tape winding It is also formed on the portion covered by the formed are and inserted into the sheathed conductive path the tubular outer member, the second tape winding portion corresponds to the end of the downward upon routing of the sheathed conductive path It is formed by fixing one end portion of the tubular exterior member and the sheath in the vicinity of the sheath end portion so as to be waterproof by tape winding , and the third tape winding portion and the other end of the tubular outer member corresponding to an end portion, wherein the shield member is formed by fixing at the tape winding and said Rukoto.

  According to the present invention having such a feature, the end portion of the sheath that is generated when the sheath is removed at a predetermined length is covered with the cylindrical exterior member. Moreover, it is a structure which fixes one edge part of a cylindrical exterior member with respect to a sheath so that waterproofing is possible. Therefore, even if there is flying water or water level rises from the side of the sheath, for example, moisture does not reach the sheath end. In the present invention, one end of the tubular exterior member is fixed to the sheath so as to be waterproof, but the other end on the opposite side and the exposed shield member are connected to, for example, a tape. Needless to say, fixing with a water is also effective for intrusion of moisture. The “waterproof” in the present invention refers to various waterproofing from simple waterproofing to complete waterproofing. This will be described in the column of the embodiment described later.

  In addition, according to the present invention, it is a structure that stops water as described above for a conductive path stop with a sheath, and as can be seen from the description in the column of the example described later, The harness terminal does not increase in size.

Moreover, according to this invention, it is a structure which tapes further to the part of a sheath edge part. Therefore, it becomes possible to improve water stop reliability.

Moreover, according to this invention, it is the structure which fixes the terminal of a cylindrical exterior member by tape winding so that waterproofing is possible. Therefore, it is possible to provide a water stop structure at a low cost if the tape is wound. In terms of cost reduction, it is effective to use a corrugated tube or a simple pipe as the cylindrical exterior member.

The present invention described in claim 2 is the water stopping structure according to claim 1, when laid in an automobile to accommodate the sheathed conductive path tube, said at a position higher than the water entering assumed line An end portion of the tubular body and a water stop structure portion adopting the water stop structure are provided.

  According to the present invention having such a feature, even if the moisture rises beyond the assumed water entry line, the moisture does not reach the sheath end.

Moreover, the wire harness of the present invention according to claim 3 , which has been made to solve the above problems, is a wire harness that is routed to an automobile and performs electrical connection, and the harness terminal of the wire harness includes: claim 1 or characterized by providing a water-stop structure formed by employing the water stopping structure according to 2.

According to this invention which has such a characteristic, it becomes a wire harness provided with the water stop structure part in the harness terminal. Water shut-off structure, since obtained by employing the water stopping structure according to claim 1 or 2, the wire harness is also claim 1 at the position of the water stop structure of action similar to that of 2 is obtained.

According to the first aspect of the present invention, there is an effect that the sheath can be removed at a predetermined length and water can be stopped at a portion where the sheath end portion is generated. Moreover , according to this invention, there exists an effect that water stop reliability can be improved. Moreover , according to this invention, there exists an effect that a water stop structure can be provided cheaply. Further, according to the present invention described in claim 2 , there is an effect that it is possible to cope with moisture that has risen beyond the assumed water entry line in the automobile.

According to the present invention described in claim 3, also claim 1 from having a water-stop structure formed by employing the water stopping structure according to 2, to make the water stop without upsizing As a result, there is an effect that a better wire harness can be provided.

It is a perspective view (including a cross-sectional view) of a water stop structure portion that adopts the water stop structure of the present invention. It is a figure of the state which led out the conductive path with a sheath and the low voltage electric wire from a corrugated tube. It is a figure of the state which removed the sheath by predetermined length. It is a figure of the state which carried out tape winding over the braid and the sheath on both sides of the sheath end. It is a figure of the state which inserted the cylindrical exterior member in the conductive path with a sheath. It is a figure of the state which wound the tape around the both ends of the cylindrical exterior member. It is a figure of the state which attached the rubber boot to the harness edge part. It is a schematic diagram which shows the wiring state of the wire harness of this invention.

  The water stop structure as the water stop structure is disposed at a position higher than the assumed water entry line when the sheathed conductive path is accommodated in the tubular body and wired in the automobile. The water stop structure is a structure in which a sheath end portion generated when the sheath is removed at a predetermined length is covered with a cylindrical exterior member. Moreover, it is a structure which fixes one edge part of a cylindrical exterior member with respect to a sheath so that waterproofing is possible. The water stop structure portion includes a cylindrical exterior member, a first tape winding portion, a second tape winding portion, and a third tape winding portion.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view (including a cross-sectional view) of a water stop structure portion employing the water stop structure of the present invention. 2 is a view showing a state where a sheathed conductive path and a low-voltage electric wire are led out from the corrugated tube, FIG. 3 is a view showing a state where the sheath is removed at a predetermined length, and FIG. FIG. 5 is a diagram of a state in which the tubular exterior member is inserted into a conductive path with a sheath, and FIG. 6 is a diagram of a state in which tape is wound around both ends of the tubular exterior member. 7 is a view showing a state in which a rubber boot is attached to the end of the harness.

<About wire harness W and water stop structure 1>
In FIG. 1, reference sign W indicates a wire harness. This wire harness W has the water stop structure part 1 which employ | adopts the water stop structure of this invention in the harness terminal 63 (refer FIG. 8). The wire harness W includes a high-voltage sheathed conductive path 2, a low-voltage electric wire 3, a round corrugated tube 4 (tube) that accommodates and protects the sheathed conductive path 2 and the low-voltage electric wire 3, and a sheathed conductive path 2. And a rubber boot B (see FIG. 7) attached to the shield connector 64.

  The water stop structure 1 is a part that can stop water at a portion where the sheath end 6 of the conductive path 2 with the sheath led out from the end 5 of the round corrugated tube 4 is generated. Moreover, it is also a part of the structure which can stop water without enlarging. In addition, the water stop structure part 1 and the edge part 5 of the round corrugated tube 4 are arrange | positioned in the position higher than the water entering assumption line L (refer FIG. 8).

<About the configuration of the conductive path 2 with the sheath>
The sheathed conductive path 2 is provided on the outside of the two insulated wire cores 7, a conductive tubular braid 8 (shield member) that collectively covers the two insulated wire cores 7, and the braid 8. And an insulating sheath 9. The braid 8 is protected by the sheath 9 in the conductive path 2 with the sheath.

<About insulated wire core 7>
Although not particularly shown, the insulated wire core 7 includes a conductor and an insulator. The conductor is formed in a circular cross section by copper or copper alloy, or aluminum or aluminum alloy. Concerning the conductor, a conductor structure in which strands are twisted together or a rod-shaped conductor structure having a rectangular or circular (round) cross section (for example, a conductor structure having a flat single core or a round single core, in this case, The wire itself may be a rod shape). In the conductor as described above, an insulator made of an insulating resin material is extruded on the outer surface.

  In addition, although the insulated wire core 7 is two in a present Example, it shall not be this limitation. It may be one or three.

  The insulator is extruded on the outer peripheral surface of the conductor using a thermoplastic resin material. The insulator is formed as a cover having a circular cross section. The insulator is formed with a predetermined thickness. As the thermoplastic resin, various known types can be used, and are appropriately selected from polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin.

<About braid 8 as a shield member>
The braid 8 is a metal part for electromagnetic shielding (shielding member for electromagnetic wave countermeasures) that collectively covers the two insulated wire cores 7, and is a known one formed by knitting a number of metal strands into a cylindrical shape. Adopted. The braid 8 is formed to have substantially the same length as the entire length of the two insulated wire cores 7, for example.

<About sheath 9>
The sheath 9 is extruded on the braid 8 by using a thermoplastic resin material in the same manner as the insulator. The sheath 9 is formed as a cover having an oval cross section. The sheath 9 is formed with a predetermined thickness. The sheath 9 is formed so as to be easily removed at a predetermined length. As the thermoplastic resin, various known types can be used, and are appropriately selected from polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin. It should be noted that a known heat shrinkable tube may be substituted.

<About the structure of the water stop structure part 1>
The water stop structure 1 includes a tubular exterior member 10 that covers a portion where the sheath end 6 in the sheathed conductive path 2 is generated, a first tape winding portion 11, a second tape winding portion 12, and a third tape winding portion 13. And is configured.

<About the tubular exterior member 10>
The tubular exterior member 10 is formed in a tubular shape that is open at both ends and has no slits. In this embodiment, the tubular exterior member 10 is a flat corrugated tube having an elliptical cross section having flexibility (it may be round. In addition, a flexible pipe or the like may be used. It may be). The cylindrical exterior member 10 is formed in a size that is slightly larger than the sheathed conductive path 2 (it is formed in a smaller size for the round corrugated tube 4). The cylindrical exterior member 10 is formed in a desired length.

<About the first tape winding part 11>
The first tape winding part 11 is formed as a tape winding part formed on the sheath end part 6. The first tape winding portion 11 is formed by winding a tape while wrapping a tape for water blocking across the braid 8 and the sheath 9 with the sheath end portion 6 interposed therebetween. In addition, although formation of the 1st tape winding part 11 is arbitrary, forming like a present Example shall be preferable. The 1st tape winding part 11 is formed in desired length. The first tape winding portion 11 can be replaced with, for example, a heat shrinkable tube.

<About the second tape winding part 12>
The second tape winding portion 12 is formed as a tape winding portion applied to the lower end portion (one end portion) of the cylindrical exterior member 11. The 2nd tape winding part 12 is a part which fixes the lower edge part of the cylindrical exterior member 11 with respect to the sheath 9 so that waterproofing is possible, and is formed by tape-wrapping the tape for water-stopping. The 2nd tape winding part 12 is formed in desired length. The second tape winding portion 12 can be replaced with, for example, a heat shrinkable tube.

<About the third tape winding part 13>
The third tape winding portion 13 is formed as a tape winding portion applied to the upper end portion (the other end portion) of the tubular exterior member 11. The third tape winding portion 13 is formed by tape-wrapping the upper end portion of the tubular exterior member 11 and the braid 8 while wrapping a water-stopping tape. The 3rd tape winding part 13 is formed in desired length. In the present embodiment, the rubber boot B (see FIG. 7) is formed over a relatively long range up to the position where the rubber boot B (see FIG. 7) is attached (it is not necessary to employ a long and large rubber boot mentioned in the column of the problem to be solved by the invention). . The third tape winding part 13 can be replaced with, for example, a heat shrinkable tube.

<About formation of the water stop structure part 1>
Next, formation of the water stop structure 1 will be described with reference to FIGS. 2 to 7. In the present embodiment, the water stop structure portion 1 sequentially goes through the following first to fourth steps.

<First step>
2 and 3, in the first step, an operation of removing the sheath 9 with a predetermined length is performed on the conductive path 2 with the sheath led out from the end 5 of the round corrugated tube 4. When this operation is performed, the sheath end 6 is formed in the sheath 9. Further, the braid 8 is exposed from the sheath end 6.

<Second step>
In FIG. 4, in the second step, an operation of forming the first tape winding portion 11 by performing tape winding across the braid 8 and the sheath 9 with the sheath end portion 6 interposed therebetween is performed. When this operation is performed, the water stop reliability is improved in the sheath end portion 6. In the present embodiment, the first tape winding portion 11 is disposed and formed only at the sheath end portion 6 as shown in the drawing, in order to ensure sufficient flexibility at the upper braided exposed portion 14. is there. The formation range of the first tape winding portion 11 is appropriately set.

<Third step>
5 and 6, in the third step, the operation of inserting the tubular exterior member 10 through the conductive path 2 with the sheath and the lower end (one end) of the tubular exterior member 11 are waterproofed to the sheath 9. Fixing work is performed. When these operations are performed, the sheath end portion 6 stopped by the first tape winding portion 11 and the braided exposed portion 14 above the first tape winding portion 10 are covered with the tubular exterior member 10. Moreover, the 2nd tape winding part 12 is formed. Even if the sheath end 6 is water-stopped and there is water splashing, or even if the water level rises from the side of the sheath 9, for example (even if the water level rises beyond the assumed water entry line L), Does not reach the sheath end 6. In addition, the above waterproofing is waterproof enough to prevent splashing of water, etc., and even if the water level rises and the outside becomes submerged, the inside is completely prevented from entering water. It is said that it is waterproof in close contact with water (to make it watertight) or waterproof enough to allow some time to penetrate even if the outside becomes submerged. What is necessary is just to set and respond | correspond appropriately the aim of "waterproof" according to the location which provides this invention. In this embodiment, tape winding is employed as a measure for preventing a certain amount of time.

<Fourth process>
6 and 7, in the fourth step, the third tape winding portion 13 is formed across the upper end portion (the other end portion) of the tubular exterior member 11 and the braid 8 in an exposed state. Work is done. When this operation is performed, the upper end portion of the tubular exterior member 11 is also stopped, and as a result, it is further effective against moisture intrusion. Note that the third tape winding portion 13 is formed in a relatively long range upward. And after formation of the 3rd tape winding part 13, the small rubber boot B is attached to this edge part.

<About the effect of the water stop structure 1>
As described above with reference to FIGS. 1 to 7, according to the water stop structure portion 1 of the present invention, the sheath end portion 6 generated when the sheath 9 is removed at a predetermined length is formed on the tubular exterior member 10. It is the structure which covers with. In addition, the lower end (one end) of the tubular exterior member 10 is fixed to the sheath 9 in a watertight manner. Therefore, even if there is flying water, for example, even if the water level rises from the side of the sheath 9 (even if the water level rises beyond the assumed water entry line L), the moisture reaches the sheath end 6. As a result, there is an effect that water can be stopped.

  In addition, the water stop structure portion 1 has a small structure, and also has an effect of increasing the degree of freedom for mounting on a vehicle. Moreover, since a structure and a structure are simple, there exists an effect that the water stop structure part 1 can be provided cheaply.

<About the wiring state of the wire harness W>
Here, the wiring state of the wire harness W provided with the water stop structure portion 1 of the present invention will be described with reference to FIG.

  In FIG. 8, reference numeral 51 indicates a hybrid vehicle. The hybrid vehicle 51 is a vehicle that is driven by mixing two powers of the engine 52 and the motor unit 53, and the motor unit 53 is supplied with electric power from the battery 55 (battery pack) via the inverter unit 54. . The engine 52, the motor unit 53, and the inverter unit 54 are mounted in the engine room 56 where the front wheels and the like are located in the present embodiment. Further, the battery 55 is mounted on a rear part 57 of the vehicle having rear wheels or the like (it may be mounted in a vehicle room existing behind the engine room 56).

  The motor unit 53 and the inverter unit 54 are connected by a high-voltage (high voltage) wire harness 58. The battery 55 and the inverter unit 54 are also connected by a high-voltage wire harness W. As for the wire harness W, this intermediate part 60 is routed to the vehicle under floor 61 (in the vehicle body) in the vehicle. Further, the intermediate portion 60 is routed substantially in parallel along the vehicle under floor 61. The vehicle underfloor 61 is a known body (vehicle body) and a so-called panel member, and a through hole is formed at a predetermined position. The wire harness W is inserted into the through hole in a watertight manner.

  The wire harness W and the battery 55 are connected via a junction block 62 provided in the battery 55. External connection means such as a shield connector 64 disposed on the harness terminal 63 on the rear end side of the wire harness W is electrically connected to the junction block 62. Further, the wire harness W and the inverter unit 54 are electrically connected via an external connection means such as a shield connector 64 disposed on the harness terminal 63 on the front end side.

  The water stop structure portion 1 of the present invention is disposed, for example, at a position of the harness terminal 63 on the front end side of the wire harness W (it may be disposed at a position higher than the assumed water entry line L).

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

  B ... Rubber boot, L ... Assumed line of water, W ... Wire harness, 1 ... Water stop structure, 2 ... Conducting path with sheath, 3 ... Low voltage electric wire, 4 ... Round corrugated tube (tube), 5 ... End 6 ... sheath end, 7 ... insulated wire core, 8 ... braid (shield member), 9 ... sheath, 10 ... cylindrical exterior member, 11 ... first tape winding portion, 12 ... second tape winding portion, 13 ... 3rd tape winding part, 14 ... Braid exposed part, 51 ... Hybrid car (automobile), 52 ... Engine, 53 ... Motor unit, 54 ... Inverter unit, 55 ... Battery, 56 ... Engine room, 57 ... Rear part of car, 58 ... Wire harness 60 ... Intermediate part 61 ... Under vehicle floor 62 ... Junction block 63 ... Harness terminal 64 ... Shield connector

Claims (3)

The sheath of a conductive path with a sheath, comprising: one or a plurality of insulated wire cores; a shield member that collectively covers the one or more insulated wire cores; and a sheath provided outside the shield member; In the water stop structure of the part where the sheath end is removed by length,
A cylindrical exterior member , a first tape winding portion, a second tape winding portion, and a third tape winding portion ,
The cylindrical exterior member is formed in a cylindrical shape having both ends open and without slits, and has a flexibility so as to be maintained between the opening and the cylindrical shape and generated between the conductive path with the sheath. Corrugated tube or pipe that is also maintained
The first tape winding portion is formed by winding the tape across the sheath and the shield member with the sheath end portion interposed therebetween, and is covered by the cylindrical exterior member inserted through the conductive path with the sheath. Formed in the part,
The second tape winding portion is formed by tape winding the one end portion of the cylindrical exterior member corresponding to the lower end portion when the conductive path with the sheath is routed and the sheath in the vicinity of the sheath end portion . Formed by fixing in a waterproof manner,
It said third tape winding portion, wherein the other end of the tubular outer member corresponding to the ends of the upper during wiring, said the shield member Ru is formed by fixing at taped Water stop structure. In the water stop structure according to claim 1,
When the sheathed conductive path is accommodated in a tubular body and routed in an automobile, a water stop structure portion adopting the end portion of the tubular body and the water stop structure is arranged at a position higher than the assumed water entry line. Water-stop structure characterized by installation . In wire harnesses that are routed to cars and make electrical connections ,
The The wire harness terminal of the harness, the wire harness, characterized in that Ru is provided a water-stop structure formed by employing the water stopping structure according to claim 1 or 2.

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